Description:Brazil's biggest protests in two decades intensified on Thursday (June 20) despite government concessions meant to quell the demonstrations, as 300,000 people took to the streets of Rio de Janeiro and hundreds of thousands more flooded other cities. In the capital, Brasilia, tens of thousands of protesters marched around Congress, the Supreme Court and presidential offices. One demonstrator, Pauliana, appealed for the protests to remain peaceful.(1:43)